In the Deep Blue Sea

Jack and his genius siblings, Ava and Matt, embark on an adventure with Dr. Hank Witherspoon. They are off to the remote Hawaiian island home of Ashley Hawking, a technology billionaire. Hawking and engineer Rosa Morris have built a revolutionary electricity plant that harvests energy from the ocean’s depths, but someone has sabotaged the project.

In his search for the culprit, Jack ventures 2,000 feet below the ocean surface in a homemade submarine. He, Ava, and Matt attend the world’s strangest birthday party, face off against an arrogant young genius, and find themselves lost at sea. The three siblings have to use all their brainpower and cunning to find out who’s behind the sabotage . . . and to survive.

Maya, a Native Hawaiian, is an interesting addition to the cast of characters. While trying to solve the mystery, Jack, Ava, Matt, and Maya are swept into the ocean on a boat that Maya made. The boat is “an exact re-creation of the boats the ancient Polynesians used to cross the Pacific and populate all these islands.” Maya’s knowledge of her ancestors helps her navigate to safety. She says, “My ancestors didn’t just use the stars. They also figured out where they were on the ocean based on the direction of different swells and currents and whether they’d been bent around an island.” Even though Ava and Matt are geniuses, Maya’s ancestors’ knowledge saves the group.   

In the Deep Blue Sea is an exciting book with many suspects that Jack and his siblings investigate. The two suspects, Steven and his bazillionaire mother, are despicable humans who prove that being rich doesn’t equal being happy. Steven’s mother isn’t concerned about harming the island or its wildlife; her lack of concern reinforces the importance of respecting and preserving nature.  

The Jack and the Geniuses Series is perfect for readers who love mysteries, action, and adventure. While the book has plenty of suspenseful and exciting scenes, they are broken up with humor and interspersed with cool science facts. Each book in the series can be read as a stand-alone novel because every book takes place in a new location with a new mystery. In the Deep Blue Sea is an entertaining story that encourages readers to think outside the box, just like Jack and the other kids do in order to survive and solve the mystery. After following Jack and his siblings into the deep blue sea, readers will be eager to read the next book in the series, Lost in the Jungle, where the siblings face dangers lurking in the Amazon Jungle. 

Sexual Content  

• None 

Violence  

• A saboteur blows up an electrical plant. No one is injured.   

Drugs and Alcohol  

• None 

Language  

• Steven, the son of a millionaire, calls Jack and the geniuses “ignorant fools” and “imbeciles.” 

Supernatural 

• None 

Spiritual Content  

• One of the characters refers to the Hawaiian fire goddess, Pele. 
• Before a storm, Maya sees little ripples on the surface of the ocean that she calls “the breath of Paka’a, the god of wind. . . The first whispers of a powerful wind—the signs of a coming storm.”